OS Retrieve File Attributes C Program

Operating Systems Lab Manual / OS Retrieve File Attributes C Program

Program Name
Write a C Program for Directory system calls used to retreive attributes of file.

Theory

Directory system calls used to retreive attributes of file.

Program Code

#include<sys/types.h>
#include<stdio.h>
#include<fcntl.h>

int main(int argc,char *argv[1])
{
printf("user has read permission\n");
if(b.st_mode & S_IWUSR)
printf("user has write permission\n");
if(b.st_mode &S_IXUSR)
printf("user has execute permission\n");
if(b.st_mode & S_IRGRP)
printf("Group has read permission\n");
if(b.st_mode & S_IWGRP)
printf("Group has write permission\n");
if(b.st_mode & S_IXGRP)
printf("Group has execute permission\n");
if(b.st_mode & S_IROTH)
printf("Others have read permisson\n");
if(b.st_mode & S_IWOTH)
printf("Others have write permission\n");
if(b.st_mode & S_IXOTH)
printf("Others have execute permission\n");

printf("Id of device containing a dir entry for this file is %d\n",b.st_dev);
printf("Id of device for char special or blk special file is %d\n",b.st_rdev);
return 0;
}

Input:

Output:
Stat Demo
USER ID is 0
GROUP ID IS 0
no of links 0
Time of last file access Wed Mar  4 05:51:52 1970
Time of last file modification Sun Apr  7 02:36:01 1974
Time of last file status change Mon Nov 25 04:21:48 1935
Block size 134513381
no of blocks 5365748
File size -1076204088
Inode no:0Id of device containing a dir entry for this file is 0
Id of device for char special or blk special file is 134513552

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